Wash the potatoes. Sprinkle a baking tray with salt, place potatoes on top. Bake in a hot oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 3) for 45 minutes. Peel and coarsely grate the beetroot. Peel and quarter the apple and remove the core.
Coarsely grate the apple. Peel and finely dice shallots. Mix with beetroot and apple. Mix vinegar, salt, pepper and mustard. Add 4 tablespoons of oil. Peel horseradish, grate finely and add. Mix with the beetroot salad and leave to stand for about 30 minutes. Fry the steaks in 2 tablespoons of hot oil for 2-3 minutes on each side. Season with salt and pepper.
Peel horseradish, grate finely and add. Mix with the beetroot salad and leave to stand for about 30 minutes. Fry the steaks in 2 tablespoons of hot oil for 2-3 minutes on each side. Season with salt and pepper. Finely chop the chervil and mix into the salad. Serve with steaks and potatoes